1/7
Name | Mastery | Learn | Test | Matching | Spaced |
---|
No study sessions yet.
Radio waves
Terrestrial radio/TV as they can travel long distances , MRI to generate images of the human body
Microwaves
Microwave oven as water molecules in the food absorb radiation and gain thermal energy cooking it. Mobile phones when waves are sent out by the transmitter. GPS as waves pass through the atmosphere the satellites to find the receiver’s location. Can cause internal heating of body cells and damage them
Infrared
Remote controls, cookers as it give out thermal radiation. Thermal imaging camera. Can cause skin burns
Visible light
Illuminations, vision and photography. Can burn at higher intensity eg with lasers
Ultraviolet
Security marks on bank notes, sterilise water by killing bacteria. Can cause skin cancer, cataracts and burns to surface cells
X rays
X ray images, crack detection, CAT scans. Can cause ionisation in skin and eyes, damaging and causing mutations in the DNA
Gamma rays
Sterilisation, radiotherapy to treat cancer. Can cause ionisation of cells and damage the DNA
Similarities between electromagnetic waved
all transverse waves
All travel at the speed of light
Can travel through a vacuum
Can transfer energy